Treatment system for ship ballast water

Abstract

The present disclosure relates to a treatment system for ship ballast water, which comprises at least: a water supply device for supplying a water stream to a first tank storing solid raw material, and a first raw material supply device for mixing the solid raw material and the water stream to form a raw material aqueous solution; a first electrolysis unit that includes a first anode chamber for obtaining a first anode product by reacting the raw material aqueous solution, a first cathode chamber for obtaining a first cathode product by reacting water and cations provided from the first anode chamber, and a first diaphragm that separates the first anode chamber and the first cathode chamber; a reaction unit for obtaining a treatment agent by reacting the first anode product and the first cathode product; and an injection unit for providing the treatment agent to the ballast water.

1 . A ballast water treatment system, which is installed inside a vessel, the treatment system comprising:
 a first feed unit that includes a first tank in which a solid raw material is stored, a water supply device that supplies a first water stream to the first tank, and a first raw material supply device that mixes the solid raw material and the first water stream to generate an aqueous raw material solution;   a first electrolysis unit that includes a first anode chamber in which a first anode product is obtained by reacting the aqueous raw material solution, a first cathode chamber in which a first cathode product is obtained by reacting water and cations provided from the first anode chamber, and a first diaphragm that separates the first anode chamber and the first cathode chamber;   a reaction unit in which a treatment agent is obtained by reacting the first anode product and the first cathode product; and   an injection unit that provides the treatment agent to ballast water.   
     
     
         2 . The ballast water treatment system of  claim 1 , wherein, in the first cathode chamber, the water is at least a portion of the first water stream, which is a solvent of the aqueous raw material solution provided in the first anode chamber, provided from the first anode chamber to the first cathode chamber through the first diaphragm. 
     
     
         3 . The ballast water treatment system of  claim 2 , wherein the first diaphragm is a water-permeable porous membrane. 
     
     
         4 . The ballast water treatment system of  claim 3 , wherein the first anode chamber includes two or more anode plates protruding at preset intervals,
 the first cathode chamber includes two or more cathode plates protruding at preset intervals in spaces between the anode plates, and   the first diaphragm is located in a space between the anode plate and the cathode plate.   
     
     
         5 . The ballast water treatment system of  claim 1 , wherein, in the first cathode chamber, the water is at least a portion of a second water stream branching from the first water stream provided to the first cathode chamber. 
     
     
         6 . The ballast water treatment system of  claim 5 , wherein the first diaphragm is a cation exchange membrane. 
     
     
         7 . The ballast water treatment system of  claim 1 , further comprising a storage unit which is disposed between the reaction unit and the injection unit and in which the treatment agent is stored. 
     
     
         8 . The ballast water treatment system of  claim 7 , further comprising a heat exchange unit that cools the first electrolysis unit using the treatment agent stored in the storage unit. 
     
     
         9 . The ballast water treatment system of  claim 1 , wherein a concentration of the treatment agent obtained in the reaction unit ranges from 0.01 to 50 wt %. 
     
     
         10 . The ballast water treatment system of  claim 1 , wherein the first feed unit further includes an aqueous raw material solution treatment device that removes impurities contained in the aqueous raw material solution. 
     
     
         11 . The ballast water treatment system of  claim 1 , further comprising a metal hydroxide generation unit including:
 a second feed unit that includes a second tank in which a metal salt containing two or more moles of metal ions in a molecule is stored, and a second raw material supply device that mixes the metal salt and a third water stream branching from the first water stream to provide an aqueous metal salt solution;   a second electrolysis unit that includes a second anode chamber in which a second anode product is obtained by reacting the aqueous metal salt solution, a second cathode chamber in which a second cathode product is obtained by reacting a fourth water stream branching from at least one of the first to third water streams or provided from the second anode chamber, and metal ions provided from the second anode chamber, and a second diaphragm that separates the second anode chamber and the second cathode chamber; and   a connection unit that combines the second cathode product and the first cathode product and provides a result of the combination to the reaction unit.   
     
     
         12 . The ballast water treatment system of  claim 11 , wherein the second tank, a pipe through which the aqueous metal salt solution is supplied to the second anode chamber, the second anode chamber, and a pipe through which the second anode product is supplied to the second tank constitutes a closed loop. 
     
     
         13 . The ballast water treatment system of  claim 12 , wherein the closed loop includes an exhaust port for discharging a gas contained in a substance circulating along the closed loop. 
     
     
         14 . The ballast water treatment system of  claim 11 , wherein the metal salt has a structure according to the following Formula:
   M x A y   <Formula>
   in Formula above, M denotes a monovalent or divalent metal ion, x denotes an integer greater than or equal to 2, A denotes a negative ionic substance that can be combined with the metal ion M, and y denotes an integer that satisfies the above Formula.   
     
     
         15 . The ballast water treatment system of  claim 11 , wherein the second diaphragm is a water-permeable porous membrane. 
     
     
         16 . The ballast water treatment system of  claim 11 , wherein the second diaphragm is a cation exchange membrane. 
     
     
         17 . The ballast water treatment system of  claim 11 , wherein the first and second electrolysis units are connected in parallel. 
     
     
         18 . The ballast water treatment system of  claim 1 , further comprising a hydrogen gas treatment unit.